NCIt definition : A carcinoma that shows both neuroendocrine and non-neuroendocrine differentiation
in the same malignant cells. It has been described in the digestive system and extra-digestive
sites. It is distinct from mixed neuroendocrine non-neuroendocrine neoplasms as it
does not contain two distinct neoplastic components, one neuroendocrine and one non-neuroendocrine.;